301-843-6551 | 12333 Washington Square, Waldorf, 20601
Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
McGhees Auto Service
Your car or truck's AC system is under extreme pressure and the thermal expansion valve or orifice tube monitors the amount of pressure and the temperature of your A/C system. It calculates the precise amount of refrigerant that can safely go into the evaporator. A failing expansion valve or orifice tube often causes a vehicle's air conditioner to blow hot air.
Replace or Repair
- Expansion Valves: Too much refrigerant causes your evaporator to get too cold whereas too little refrigerant would result in inadequate cooling. The expansion valve is a complex valve that regulates refrigerant flow. This process of metering the refrigerant adjusts the flow according to the temperature of the refrigerant in the evaporator coil. Talk to one of the pro mechanics at McGhees Auto Service, as this part can be replaced on its own and does not require the entire replacement of the AC assembly.
- Orifice Tubes: Unlike the expansion valve, the orifice tube is a simple fixed device with no moving parts. It therefore cannot vary the flow of refrigerant into the evaporator, but rather causes a permanent restriction in the system. However, like the expansion valve the orifice tube regulates refrigerant flow through the system and filters debris which may come through in its screen. Often fixing a "bad orifice tube" requires replacing the entire evaporator assembly.
More AC Repair Services:
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Jerry M., 07/05/2021
I called the night before and wanted to setup an appointment. Jim's friendly voice stated "MD inspection is 1st come ; 1st serve." I was there around 8ish. Although they didn't open til 9am, the shop was early at work, Jim got me out by 10am. I didn't pass inspection but, Bill's and Jim's personable, friendly and quick turnaround was a memorable one. This type of shop is locally owned and trustworthy. It is a dying breed. I provided the team with a KrispyKreme Gift Card after my visit. I will have to come again for a re-inspection but will also come again for any automobile needs.